The decimal 2.25 is equal to the fraction 9/4. The decimal first needs to be converted to the basic fraction 2 1/4 before being converted to an improper fraction.The top of a fraction is called the numerator while the bottom is known as the denominator. The whole number standing before a fraction is referred to as an integer.An improper fraction is formed by first multiplying the denominator by the integer, in this case, arriving at eight. The next step is to add the numerator to this sum, totalling nine. This number is then used as the numerator of the improper fraction.